Deflection yoke

Details Deflection yoke Deflection yoke

1988-12-29

1990-07-03

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

358248, 335211, H01J 2970, H04N 5645, H01F 312

Patent

active

049394150

ABSTRACT:
A deflection yoke to be used in a color CRT apparatus having an aspherical face panel (30) has a pair of magnetic members (6,7) disposed on an outer surface of a larger diameter part of a cone shaped coil holding frame (11) in symmetry with respect to a vertical plan including center axis of the coil holding frame (11). Each of magnetic member (6,7) has upper and lower magnetic parts (6b,6c) for distorting vertical deflection magnetic field from barrel shape to pincushion shape, and the upper or lower magnetic parts (6b, or 6c) has protruded magnetic parts (6d or 6e), respectively protruded from the upper or lower magnetic parts (6b or 6c) towards screen part of the color CRT apparatus, for partially correction of pincushion distortion of raster at peripheral part of screen.

REFERENCES:
patent: 4746837 (1988-05-01), Vink

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